Their series ofBeauty Biblebooks are now bestsellers worldwide – and this column solves your beauty dilemmas. Visit their website, beautybible.com, to source any of the products mentioned below online – and for lots more information, tips and exclusive offers.

And if you have a beauty dilemma you would like them to answer, you can e-mail them there too.

A: As we get older, skin changes. You are lucky in that you seem to have escaped the dry sensitive complexion that presents problems for many women of this age group (which we belong to as well). Since you have tried such a range without success, we think you might need to revisit your skincare routine before investing in a new foundation.

We asked leading make-up artist Armand Beasley (armandinternationalltd.com) for his tips. He says: ‘Getting your skin into tiptop shape will make it easier for you to use foundation, and achieve a good result. Make sure you are using an effective cleanser, alcohol-free toner and a suitable day moisturiser to suit your skin’s current needs.’

If you haven’t found a perfect fit skincare-wise, may we suggest looking at Liz Earle’s Natural Active Skincare range? Herwebsite, has lots of useful information and questionnaires to signpost you to suitable products. We love her well-priced skincare and use it ourselves.

Armand always advises investing in a good serum. These products which are designed to go under your moisturiser are chockfull of skin-loving nutrients. He recommends Iconic Youth Serum from Merumaya, based on moringa oil (£34.50 frommerumaya.com), which Sarah also likes a lot.

Lancome Genifique Youth Activating Concentrate, £56 for 30ml, has an impressive track record of awards (available nationwide), and at the luxury end Sisley’s Sisleya-Elixir, £267 for 4 x 5ml, will provide an ‘intensive MOT for your skin’, says Armand. Available from John Lewis.

Now while they may help your skin’s appearance quite rapidly, the full effect will take one or two skin cycles, so a month or two. If you still have your existing foundations on your dressing table, try them on then and you are almost guaranteed to see a difference in how it looks and feels. But one tip: leave five or ten minutes between applying serum and moisturiser before you stroke on your foundation. It will look better and last longer.

If you still feel like trying a new foundation, Armand – who has worked with some stunning older women including Goldie Hawn – always uses the following:• Lancome Teint Miracle, which has inbuilt luminosity. £27 in 18shades.• Armani Luminous Silk Foundation, lightweight and buildable with a dewy finish. £34 in nine shades, available at good department stories.• Sisley Skineleya Anti-Ageing Foundation, which is price-y but firms skin and minimises pores, £113 in nine shades.

As the party season hurtles towards us, we've a new must-have for the dressing table. Hold the crystal-faceted-esqe handle and whisk this pink, fluffy brush over décolletage, arms, shins - anywhere that's bare, actually. It's softly fragrant and super-glamorous - and rather a good price for a beauty treasure with serious boudoir chic. £7.50